IOS: dynamic height with a custom uitableviewcell

Question

I am new at ios development and this is my problem thus far. I am able to dynamically calculate the height of a custom cell via the delegate \"heightForRowAtIndexPath\". S

Answer 1

If the text in the cells is going to change, you will need to a call reloadData on your tableView when it does, otherwise the tableView:heightForRowAtIndexPath: won't be called.

The way the tableView works is that it gathers the heights for all rows at every reload (and the reload variants). This is how iOS knows the height of the entire table. It doesn't call tableView:heightForRowAtIndexPath: again when grabbing individual cells. Usually calling reloadData is quite quick and this method, unlike its variants, doesn't cause any scrolling.

See stackoverflow question and answer for useful background.

Problems arise if you have to do a lot of work to calculate heights and you have hundreds or thousands of rows. In one use case I have like this, I cache the row height calculations to get decent performance. But if that's not your case, just be a little more liberal with reloadData.